annotate lib/progname.c @ 7470:7138ae14facc

Make it possible to #define set_program_name to an alias.
author Bruno Haible <bruno@clisp.org>
date Wed, 11 Oct 2006 12:37:31 +0000
parents 1c4ed7637c24
children bbbbbf4cd1c5
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1 /* Program name management.
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2 Copyright (C) 2001-2003, 2005-2006 Free Software Foundation, Inc.
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3 Written by Bruno Haible <haible@clisp.cons.org>, 2001.
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4
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5 This program is free software; you can redistribute it and/or modify
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6 it under the terms of the GNU General Public License as published by
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7 the Free Software Foundation; either version 2, or (at your option)
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8 any later version.
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9
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10 This program is distributed in the hope that it will be useful,
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11 but WITHOUT ANY WARRANTY; without even the implied warranty of
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12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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13 GNU General Public License for more details.
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14
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15 You should have received a copy of the GNU General Public License
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16 along with this program; if not, write to the Free Software Foundation,
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17 Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */
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18
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19
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20 #include <config.h>
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21
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22 /* Specification. */
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23 #undef ENABLE_RELOCATABLE /* avoid defining set_program_name as a macro */
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24 #include "progname.h"
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25
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26 #include <string.h>
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27
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28
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29 /* String containing name the program is called with.
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30 To be initialized by main(). */
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31 const char *program_name = NULL;
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32
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33 /* Set program_name, based on argv[0]. */
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34 void
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35 set_program_name (const char *argv0)
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36 {
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37 /* libtool creates a temporary executable whose name is sometimes prefixed
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38 with "lt-" (depends on the platform). It also makes argv[0] absolute.
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39 Remove this "<dirname>/.libs/" or "<dirname>/.libs/lt-" prefix here. */
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40 const char *slash;
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41 const char *base;
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42
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43 slash = strrchr (argv0, '/');
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44 base = (slash != NULL ? slash + 1 : argv0);
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45 if (base - argv0 >= 7 && memcmp (base - 7, "/.libs/", 7) == 0)
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46 argv0 = base;
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47 if (strncmp (base, "lt-", 3) == 0)
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48 argv0 = base + 3;
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49 program_name = argv0;
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50 }